Transmission line protection using traveling waves in optical ground wire fiber

Patent metadata

Field	Value
Publication number	US-9509399-B2
Application number	US-201615041578-A
Country	US
Kind code	B2
Filing date	Feb 11, 2016
Priority date	Feb 13, 2015
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.

First claim

What is claimed is:

1. A system configured to monitor an optical ground wire (OPGW) fiber associated with an electric power line, comprising:
a state of polarization (SOP) detection subsystem to detect a change in at least one polarization parameter of optical radiation carried by the OPGW fiber and caused by a disturbance on the electric power line;
a digitization subsystem configured to create a first digitized representation of the at least one polarization parameter; and
a…

Assignees

• Schweitzer Engineering Lab Inc

Inventors

• Kasztenny Bogdan Z
• Taylor Douglas I

Classifications

• G01R31/08

  Physics · mapped topic

• H04B10/032 Primary

  Electricity · mapped topic

• H04B10/0791 Primary

  Electricity · mapped topic

• H02H7/265 Primary

  Electricity · mapped topic